Yoda battles for the soul swords in Soulcalibur IV … It seems like everything's digital these days, even drugs … Swarms of robots could do the dangerous work for us … Learn how to say "hundred-meter dash" in Mandarin … Can a car run on nothing but air?

But then, on September 2, Wilma Rudolph won gold in the hundred-meter dash, enthralling not only fans inside the Stadio Olimpico but also millions of Americans back home, who viewed the event hours later on CBS.

It is possible that the explosive yield was so low because North Korea made a mistake in their design or construction (a so-called "fizzle" -- though one that would still excavate a hundred-meter crater in a major city), or it is possible that they were intentionally trying to build a low-mass weapon that they could put on top of a missile.